TPS51218 Datasheet | Texas Instruments

.ti. SLUS935B - MAY 2009 - REVISED FEBRUARY 2012 HIGH PERFORMANCE, SINGLE SYNCHRONOUS STEP-DOWN CONTROLLER FOR NOTEBOOK POWER SUPPLY Check for Samples: TPS51218 Features - 2 Wide Input Voltage Range: 3 V to 28 V - Output Voltage Range: 0.7 V to 2.6 V - Wide Output Load Range: 0 to 20A+ - Built-in 0.5% 0.7 V Reference - D-CAP™ Mode with 100-ns Load Step Response - Adaptive On Time Control Architecture With 4 Selectable Frequency Setting - 4700 ppm/°C RDS(on) Current Sensing - Internal 1-ms Voltage Servo Softstart - Pre-Charged Start-up Capability - Built in Output Discharge - Power Good Output - Integrated Boost Switch - Built-in OVP/UVP/OCP - Thermal Shutdown (Non-latch) - SON-10 (DSC) Package APPLICATIONS - Notebook puters - I/O Supplies - System Power Supplies DESCRIPTION The TPS51218 is a small-sized single buck controller with adaptive on-time D-CAP™ mode. The device is suitable for low output voltage, high current, PC system power rail and similar point-of-load (POL) power supply in digital consumer products. A small package with minimal pin-count saves space on the PCB, while a dedicated EN pin and pre-set frequency selections minimize design effort required for new designs. The skip-mode at light load condition, strong gate drivers and low-side FET RDS(on) current sensing supports low-loss and high efficiency, over a broad load range. The conversion input voltage which is the high-side FET drain voltage ranges from 3 V to 28 V and the output voltage ranges from 0.7 V to 2.6 V. The device requires an external 5-V supply. The TPS51218 is available in a 10-pin SON package specified...